LAYER_ADDED action.LAYER_MODIFIED action.LAYER_REMOVED action.LINK_ADDED action.LINK_ADDED action.LINK_DOWN action.LINK_DOWN action.LINK_MODIFIED action.LINK_MODIFIED action.LINK_REMOVED action.LINK_REMOVED action.LINK_UP action.LINK_UP action.NetPlan from a .n2p file.NetPlan from an input stream.long primitives.